2003-02-15 13:24:29

by Morten Helgesen

Subject: [2.4.20 Oops]

Hey guys,

keep getting this on an sql-server running 2.4.20. It happens during
backup of mysql databases. Easily reproducible. After the oops, processes
trying to access /backup end up in 'D' state. Btw, filesystem
is reiserfs. Anyone got a clue ?

<1>Unable to handle kernel NULL pointer dereference at virtual address 00000018
printing eip:
c01322a0
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[try_to_free_buffers+20/228] Not tainted
EFLAGS: 00010207
eax: 00000000 ebx: c10ee294 ecx: 000001d2 edx: 00000000
esi: 00000000 edi: d3bd8e00 ebp: c10ee294 esp: ce061e24
ds: 0018 es: 0018 ss: 0018
Process cp (pid: 23696, stackpage=ce061000)
Stack: c10ee294 000001d2 00000017 00000200 c013087c d3bd8e00
c10ee294 c01286d2 c10ee294 000001d2 00000020 000001d2
00000020 00000006 00000006 ce060000 00003e19 000001d2
c0295c74 c0128930 00000006 00000004 00000006 00000020
Call Trace: [try_to_release_page+68/72] [shrink_cache+490/764]
[shrink_caches+88/128] [try_to_free_pages_zone+58/92]
[balance_classzone+80/456] [__alloc_pages+274/352]
[reiserfs_get_block+0/3648] [_alloc_pages+22/24]
[page_cache_read+110/188] [generic_file_readahead+261/316]
[do_generic_file_read+422/1028] [generic_file_read+124/272]
[file_read_actor+0/140] [sys_read+150/240] [system_call+51/56]

Code: 8b 56 18 8b 46 10 83 e2 06 09 d0 75 76 8b 76 28 39 fe 75 ec


[14:31][admin@sql:~]$ uname -a
Linux sql 2.4.20 #2 Thu Jan 23 00:43:06 CET 2003 i686 unknown

[14:31][admin@sql:~]$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 7
model name : Pentium III (Katmai)
stepping : 3
cpu MHz : 601.374
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips : 1199.30

== Morten

--

"Livet er ikke for nybegynnere" - sitat fra en klok person.

mvh
Morten Helgesen
UNIX System Administrator & C Developer
Nextframe AS
[email protected] / 93445641
http://www.nextframe.net

2003-02-17 07:00:29

by Oleg Drokin

Subject: Re: [2.4.20 Oops]

Hello!

On Sat, Feb 15, 2003 at 02:35:48PM +0100, Morten Helgesen wrote:

> keep getting this on an sql-server running 2.4.20. It happens during
> backup of mysql databases. Easily reproducible. After the oops, processes
> trying to access /backup end up in 'D' state. Btw, filesystem
> is reiserfs. Anyone got a clue ?
> EIP: 0010:[try_to_free_buffers+20/228] Not tainted

Hmm. Perhaps try to run memtest86 for some time to verify that your RAM is still ok?

Thank you.

Bye,
Oleg